diff --git a/aiogram/dispatcher/__init__.py b/aiogram/dispatcher/__init__.py
index 61e116d4..7312aac7 100644
--- a/aiogram/dispatcher/__init__.py
+++ b/aiogram/dispatcher/__init__.py
@@ -181,6 +181,7 @@ class Dispatcher:
             raise RuntimeError('Pooling already started')
         log.info('Start pooling.')
         context.set_value(MODE, LONG_POOLING)
+        context.set_value('dispatcher', self)
         context.set_value('bot', self.bot)
 
         self._pooling = True
diff --git a/aiogram/dispatcher/webhook.py b/aiogram/dispatcher/webhook.py
index 50136aad..89636aa8 100644
--- a/aiogram/dispatcher/webhook.py
+++ b/aiogram/dispatcher/webhook.py
@@ -53,7 +53,10 @@ class WebhookRequestHandler(web.View):
 
         :return: :class:`aiogram.Dispatcher`
         """
-        return self.request.app[BOT_DISPATCHER_KEY]
+        dp = self.request.app[BOT_DISPATCHER_KEY]
+        context.set_value('dispatcher', dp)
+        context.set_value('bot', dp.bot)
+        return dp
 
     async def parse_update(self, bot):
         """
@@ -63,7 +66,7 @@ class WebhookRequestHandler(web.View):
         :return: :class:`aiogram.types.Update`
         """
         data = await self.request.json()
-        update = types.Update.deserialize(data)
+        update = types.Update(**data)
         bot.prepare_object(update, parent=bot)
         return update